Tank scaffold



Patented Nov. 10, 1925.

Urrea J AY ALBERT STOUGH,

OF TEILSA, OKLAHOMA.

TANK SCAFFOLD.

Application led October 6, 1924. Serial No. 741,920.

To all whom t may concern:

Be it known that I, JAY ALBERT Scioperi, a citizen of the United States,residing at Tulsa, in the county of Tulsa and State of klahoma, haveinvented certain new and useful Improvements in Tank Scaffolds; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

This Ainvention relates to tank scaffolds and it is particularlyapplicable for use in the erection of oil tanks of large capacity suchas are used as storage tanks in the oil fields and the inventionconsists in certain novel parts and combinations of parts, 'all of whichwill be specifically described hereinafter, reference being had to theaccompanyinfy drawings, in whichw Fig. 1 is a side elevational view of aportion of a tank to which my invention is applied.

Fig. 2 is a sectional view through the tank showing the end of thescaffold, and

Fig. 3 is a fragmentary top view showing the scaffold applied.

A tank is made up of a plurality of rings, each ring being a segment ofa circle. The segments are fastened together, end to end to form thering and the lower edges of the segments of one ring are fastened to theupper edges of the segments of the next lower ring as will be wellunderstood. The rings are fastened by rivets and the joints between therings are calked so I have provided a scaffold whereby operators maywork from both sides of the tank, that is from the inside and outsideand the construction of the scaffold will now be described.

1 is a top rail illustrated as an angle iron and connected to the pairsof end bars by suitable brackets 2 and The brackets support the verticalend bars 4, 5, 6 and 7, the bars 4 and 5 constituting one pair and thebars 6 and 'l constituting the other pair.

Suspended from the brackets by the hangers 8 and 9 are sheaves 10 and 11which are adapted to ride on the upper edges of the plates 12 of thetank structure. The lengths of the end bars 4, 5, 6 and 7 are greaterthan the widths of the plates 12 so that they eX- tend below the lowerends of the plates and support outstanding platforms 13 and 14,

braced to the bars 4,l 5, 6: and 'l' by angle brackets 15 and 16.

The platforms 13 and 14 support the operators so it will be apparentthat the operators can work from opposite sides of the wall of the tankand that the scaffold may be moved along the upper edge of the tank aswork progresses. The length of the bar 1 which governs the length of thescaffold may vary but ordinarily it will be equal to about one-fourth toone-half the circumference of thetank, the length however is immaterial.

As the tank upon which the scaffold is employed is circulary in crosssection, it is necessary, in order to provide a substantial mounting forthe supporting pulleys and to prevent grinding of the pulleys on the rimof the tank, that the pulley axes extend radially of the tank. Itherefore set the brack ets 2 and 3 on such radial lines that when theangle iron end bars are applied to the brackets, the free flanges ofthebars will be perpendicular tov a radius running there through.Consequently the 'apertures in the arms of hangers 8 are likewise radialas are the axes of the sheaves 10. The angle brackets 15 and 16 beingattached to the angle iron and bars, are also radial, thereby providingproper balance throughout the structure.

It will be apparent that the scaffold can be readily slipped over theedge of the tank and thatit will adequately support the operators in theerection of the tank.

vWhat I claim and desire to secure by Letters-Patent is A scaffoldadapted to be supported on a tank of circular cross section, comprisingpaired end bars for straddling the wall of the tank, a radial bracketconnecting the bars of each pair, a top rail connecting the brackets, ahanger in each pair of end bars, grooved wheels carried in said hangerson radial axes and adapted for movably supporting the scaffold from therim of the tank, radial platform brackets on Vthe end bars, andplatforms carried by the platform brackets.

In testimony whereof I affix my signature.

JAY ALBERT sToUeH.

